Outline ![]()
Files ![]()
loading...
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
/**
******************************************************************************
* @file BSP/Src/sdram_dma.c
* @author MCD Application Team
* @brief This example code shows how to use the SDRAM Driver
******************************************************************************
* @attention
*
* Copyright (c) 2017 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "main.h"
/** @addtogroup STM32F4xx_HAL_Examples
* @{
*/
/** @addtogroup BSP
* @{
*/
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define SDRAM_DMA_BUFFER_SIZE ((uint32_t)256)
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
static uint32_t sdram_aTxBuffer[SDRAM_DMA_BUFFER_SIZE];
static uint32_t sdram_aRxBuffer[SDRAM_DMA_BUFFER_SIZE];
extern SDRAM_HandleTypeDef sdramHandle;
//DMA_HandleTypeDef hdma;
/* DMA transfer complete flag */
__IO uint32_t uwDMA_Transfer_Complete = 0;
/* Private function prototypes -----------------------------------------------*/
static void SDRAM_DMA_SetHint(void);
static void Fill_Buffer(uint32_t *pBuffer, uint32_t uwBufferLength, uint32_t uwOffset);
static uint8_t Buffercmp(uint32_t* pBuffer1, uint32_t* pBuffer2, uint16_t BufferLength);
/* Private functions ---------------------------------------------------------*/
/**
* @brief SDRAM Demo
* @param None
* @retval None
*/
void SDRAM_DMA_demo (void)
{
SDRAM_DMA_SetHint();
/* -1- SDRAM device configuration */
if (BSP_SDRAM_Init() != SDRAM_OK)
{
BSP_LCD_DisplayStringAt(20, 115, (uint8_t *)"SDRAM Initialization : FAILED.", LEFT_MODE);
BSP_LCD_DisplayStringAt(20, 130, (uint8_t *)"SDRAM Test Aborted.", LEFT_MODE);
}
else
{
BSP_LCD_DisplayStringAt(20, 100, (uint8_t *)"SDRAM Initialization : OK.", LEFT_MODE);
}
/* -2- Fill the buffer to write */
Fill_Buffer(sdram_aTxBuffer, SDRAM_DMA_BUFFER_SIZE, 0xA244250F);
/* -3- Write data to the SDRAM memory using DMA */
uwDMA_Transfer_Complete = 0;
if (BSP_SDRAM_WriteData_DMA((SDRAM_WRITE_READ_ADDR + SDRAM_WRITE_READ_ADDR_OFFSET), sdram_aTxBuffer, SDRAM_DMA_BUFFER_SIZE) != SDRAM_OK)
{
BSP_LCD_DisplayStringAt(20, 115, (uint8_t *)"SDRAM WRITE dma : FAILED.", LEFT_MODE);
BSP_LCD_DisplayStringAt(20, 130, (uint8_t *)"SDRAM Test Aborted.", LEFT_MODE);
}
else
{
BSP_LCD_DisplayStringAt(20, 115, (uint8_t *)"SDRAM WRITE DMA : REQUESTED", LEFT_MODE);
}
/* Wait until DMA transfer is complete */
while (!uwDMA_Transfer_Complete)
{}
BSP_LCD_DisplayStringAt(20, 130, (uint8_t *)"SDRAM WRITE DMA : COMPLETED", LEFT_MODE);
/* -4- Read back data from the SDRAM memory using DMA */
uwDMA_Transfer_Complete = 0;
if (BSP_SDRAM_ReadData_DMA((SDRAM_WRITE_READ_ADDR + SDRAM_WRITE_READ_ADDR_OFFSET), sdram_aRxBuffer, SDRAM_DMA_BUFFER_SIZE) != SDRAM_OK)
{
BSP_LCD_DisplayStringAt(20, 145, (uint8_t *)"SDRAM READ DMA : FAILED", LEFT_MODE);
BSP_LCD_DisplayStringAt(20, 160, (uint8_t *)"SDRAM Test Aborted", LEFT_MODE);
}
else
{
BSP_LCD_DisplayStringAt(20, 145, (uint8_t *)"SDRAM READ DMA : REQUESTED", LEFT_MODE);
}
/* Wait until DMA transfer is complete */
while (!uwDMA_Transfer_Complete)
{}
BSP_LCD_DisplayStringAt(20, 160, (uint8_t *)"SDRAM READ DMA : COMPLETED", LEFT_MODE);
/* -5- Compare both buffers */
if (Buffercmp(sdram_aTxBuffer, sdram_aRxBuffer, SDRAM_DMA_BUFFER_SIZE) > 0)
{
BSP_LCD_DisplayStringAt(20, 175, (uint8_t *)"SDRAM COMPARE : FAILED.", LEFT_MODE);
BSP_LCD_DisplayStringAt(20, 190, (uint8_t *)"SDRAM Test Aborted.", LEFT_MODE);
}
else
{
BSP_LCD_DisplayStringAt(20, 175, (uint8_t *)"SDRAM TEST : SUCCESSFUL", LEFT_MODE);
}
while (1)
{
if (CheckForUserInput() > 0)
{
return;
}
}
}
/**
* @brief DMA conversion complete callback
* @note This function is executed when the transfer complete interrupt
* is generated
* @retval None
*/
void HAL_SDRAM_DMA_XferCpltCallback(DMA_HandleTypeDef *hdma)
{
/* Set transfer complete flag */
uwDMA_Transfer_Complete = 1;
}
/**
* @brief DMA transfer complete error callback.
* @param hdma: DMA handle
* @retval None
*/
void HAL_SDRAM_DMA_XferErrorCallback(DMA_HandleTypeDef *hdma)
{
BSP_LCD_SetTextColor(LCD_COLOR_RED);
BSP_LCD_DisplayStringAt(20, 215, (uint8_t *)"DMA ERROR", LEFT_MODE);
}
/**
* @brief Display SDRAM Demo Hint
* @param None
* @retval None
*/
static void SDRAM_DMA_SetHint(void)
{
/* Clear the LCD */
BSP_LCD_Clear(LCD_COLOR_WHITE);
/* Set LCD Demo description */
BSP_LCD_SetTextColor(LCD_COLOR_BLUE);
BSP_LCD_FillRect(0, 0, BSP_LCD_GetXSize(), 80);
BSP_LCD_SetTextColor(LCD_COLOR_WHITE);
BSP_LCD_SetBackColor(LCD_COLOR_BLUE);
BSP_LCD_SetFont(&Font24);
BSP_LCD_DisplayStringAt(0, 0, (uint8_t *)"SDRAM DMA", CENTER_MODE);
BSP_LCD_SetFont(&Font12);
BSP_LCD_DisplayStringAt(0, 30, (uint8_t *)"This example shows how to write", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, 45, (uint8_t *)"and read data on SDRAM", CENTER_MODE);
/* Set the LCD Text Color */
BSP_LCD_SetTextColor(LCD_COLOR_BLUE);
BSP_LCD_DrawRect(10, 90, BSP_LCD_GetXSize() - 20, BSP_LCD_GetYSize() - 100);
BSP_LCD_DrawRect(11, 91, BSP_LCD_GetXSize() - 22, BSP_LCD_GetYSize() - 102);
BSP_LCD_SetTextColor(LCD_COLOR_BLACK);
BSP_LCD_SetBackColor(LCD_COLOR_WHITE);
}
/**
* @brief Fills buffer with user predefined data.
* @param pBuffer: pointer on the buffer to fill
* @param uwBufferLength: size of the buffer to fill
* @param uwOffset: first value to fill on the buffer
* @retval None
*/
static void Fill_Buffer(uint32_t *pBuffer, uint32_t uwBufferLength, uint32_t uwOffset)
{
uint32_t tmpIndex = 0;
/* Put in global buffer different values */
for (tmpIndex = 0; tmpIndex < uwBufferLength; tmpIndex++ )
{
pBuffer[tmpIndex] = tmpIndex + uwOffset;
}
}
/**
* @brief Compares two buffers.
* @param pBuffer1, pBuffer2: buffers to be compared.
* @param BufferLength: buffer's length
* @retval 1: pBuffer identical to pBuffer1
* 0: pBuffer differs from pBuffer1
*/
static uint8_t Buffercmp(uint32_t* pBuffer1, uint32_t* pBuffer2, uint16_t BufferLength)
{
while (BufferLength--)
{
if (*pBuffer1 != *pBuffer2)
{
return 1;
}
pBuffer1++;
pBuffer2++;
}
return 0;
}
/**
* @}
*/
/**
* @}
*/